B1381 Diagnostic Trouble Code

B1381 is a kind of OBD-II Diagnostic B-Body Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a B1381 diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
Engine surge

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. Now, clear the codes and test-drive the vehicle to see if the code is reset. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code B1381 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before B1381.

Fortunately, B1381 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1381 Trouble Code For Specific Cars

B1381 Fiat 525 Lamp Brake Warning Output Circuit Open
B1381 Puma Gt Fuel Temperature Sensor #1 Circuit Short to Battery
B1381 Porsche 924 Fuel Delivery System Malfunction - High
B1381 Ford Country Main Catalyst Efficiency Below Threshold (Bank 2)
B1381 Sunbeam 20 Main Catalyst Efficiency Below Threshold (Bank 1)
B1381 Jowett Javelin Seat Headrest Feedback Potentiometer Circuit Short to Battery
B1381 Honda Stream Reverse Inhibit Control Circuit Malfunction